captaincore/app/quicksave/backup

#!/usr/bin/env bash

#
#   Backs up quicksave git repo to restic (Backblaze B2).
#
#   `captaincore quicksave backup <site>`
#
#   [<site>...]
#   One or more sites.
#
#   [@<target>]
#   Target groups of sites like @all @production or @staging.
#
#   [--parallel=<number>]
#   Number of backups at same time
#
#   [--skip-if-recent=<timeframe>]
#   Skip if restic snapshot exists within the specified timeframe (e.g., "24h", "7d").
#

if [ ${#@} -ne 1 ]; then
  echo -e "${COLOR_RED}Error:${COLOR_NORMAL} Please specify a <site>."
  exit
fi

while read config; do
  if [[ "$config" == "Error:"* ]]; then
    continue
  fi
  declare "$config"
done <<< "$(captaincore config fetch --captain-id=$CAPTAIN_ID)"

site=$1

run_command() {

  # Extract environment
  if [[ "$site" == *"-staging"* ]]; then
      environment=staging
  else
      environment=production
  fi

  # Load site configs
  IFS=$'\n'$'\r'; for line in $(captaincore site get $site --bash --captain-id=$CAPTAIN_ID); do declare "$line"; done; unset IFS

  # Return error if domain not found
  if [[ "$domain" == "" ]] || [[ "$site" == "" ]]; then
      echo "Can't locate website for $site"
      exit
  fi

  site_path="${site}_${site_id}/${environment}"

  # Check quicksave repo exists
  if [ ! -d "$path/$site_path/quicksave/.git" ]; then
    echo "No quicksave repo found for $site ($environment). Skipping."
    exit 0
  fi

  # --------------------------------------------------
  # Skip if recent restic snapshot exists
  # --------------------------------------------------
  if [[ -n "$SKIP_IF_RECENT" ]]; then
    restic_repo="rclone:$rclone_backup/${site}_${site_id}/${environment}/quicksave-repo"
    restic_key="${CAPTAINCORE_PATH}/data/restic.key"

    latest_snapshot=$( restic snapshots --repo "$restic_repo" --password-file="$restic_key" --json --latest 1 2>/dev/null )

    if [[ -n "$latest_snapshot" ]] && [[ "$latest_snapshot" != "null" ]] && [[ "$latest_snapshot" != "[]" ]]; then
      snapshot_time=$( echo "$latest_snapshot" | php -r '
        $json = json_decode(file_get_contents("php://stdin"), true);
        if (!empty($json[0]["time"])) {
          echo $json[0]["time"];
        }
      ' )

      if [[ -n "$snapshot_time" ]]; then
        should_skip=$( php -r '
          $snapshot_time = strtotime($argv[1]);
          $threshold = $argv[2];
          $unit = substr($threshold, -1);
          $value = (int) substr($threshold, 0, -1);
          switch ($unit) {
            case "h": $seconds = $value * 3600; break;
            case "d": $seconds = $value * 86400; break;
            case "w": $seconds = $value * 604800; break;
            default:  $seconds = $value; break;
          }
          echo (time() - $snapshot_time < $seconds) ? "true" : "false";
        ' "$snapshot_time" "$SKIP_IF_RECENT" )

        if [[ "$should_skip" == "true" ]]; then
          echo "Skipping $site ($environment) - Restic snapshot within last $SKIP_IF_RECENT."
          exit 0
        fi
      fi
    fi
  fi
  # --------------------------------------------------

  cd "$path/$site_path/quicksave/"
  echo "$(date +'%Y-%m-%d %H:%M') Backing up /quicksave/ to restic repo for $site ($environment)"

  restic_repo="rclone:$rclone_backup/${site}_${site_id}/${environment}/quicksave-repo"
  restic_key="${CAPTAINCORE_PATH}/data/restic.key"

  # Initialize restic repo if needed
  if [[ $( restic snapshots --repo "$restic_repo" --password-file="$restic_key" 2>&1 ) == "" ]]; then
    echo "Generating new restic repo ${site}_${site_id}/${environment}/quicksave-repo"
    restic init --quiet --repo "$restic_repo" --password-file="$restic_key"
    # Back up the repo key locally
    captaincore backup key-backup ${site}-${environment} --type=quicksave --captain-id=$CAPTAIN_ID 2>/dev/null || true
  fi

  restic backup . --quiet --repo "$restic_repo" --exclude-file="${CAPTAINCORE_PATH}/lib/restic-excludes" --password-file="$restic_key"

  # Purge local restic cache for this repo to save disk space
  repo_id=$( restic cat config --repo "$restic_repo" --password-file="$restic_key" --json 2>/dev/null | php -r 'echo json_decode(file_get_contents("php://stdin"))->id ?? "";' )
  if [[ -n "$repo_id" ]] && [[ -d "$HOME/.cache/restic/$repo_id" ]]; then
    rm -rf "$HOME/.cache/restic/$repo_id"
  fi

  if [ -f "${path}/process-${process_id}-progress.log" ]; then
    echo -n "." >> ${path}/process-${process_id}-progress.log
  fi

}

run_command